Vamp-trimming machine



C. C. BLAKE. vAMP TRIMMING MACHINE.

APPLICATION FILED APR. 27, 1918.

3 SHEETS-SHEET I.

Patented Mar. 2,

c. c. BLAKE.

VAMP TRIMMING MACHINE.

. APPLICATION .HLED APR.27, l9l8- v 1,332,198. Patented Mar. 2, 1920.

' 3 SHEETS-SHEET 2.

/ VENTUR C. C. BLAKE. VAAMP TRIMMING MACHINE. APPLICATION HLED mm]. I918.

Patented 2, 1920.

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CHARLES C. BLAKE, 0F BROUKLINE, llIASSAGl-EUSETTS, ASSIGN'OR T0 C, C. BLAKE, INCORPORATED, 013 BQSTON, MAS$ACHUSETTS, A CORPORATION OF NEW YORK.

VAMP-TRIMMING MACHINE.

' Application filed April 27, 1918.

T 0 all whom it may concern:

Be it known that 1, CHARLES C. BLAKE, a citizen of the United States, residing at Brookline, in the county of Norfolk and State of Massachusetts, have invented certain Improvements in Vamp-Trimming Machines, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

The present invention relates to vamp trimming machines which are used in the manufacture of boots and shoes to trim the vamps thereof and thus prepare the shoes for a subsequent shoe bottoming operation, and more particularly to a vamp trimming machine for performing the second vamp trimming operation in the manufacture of Blake welt shoes for trench use by our soldiers overseas.

In ordinary shoes the uppers are lined with cloth but the Government specifications call for an upper having a leather lining of substantially equal thickness with the upper thus forming what may be called a two-ply upper. The inner ply or lining is overlaid upon the insole at the shank thereof in order that the mid-sole by pressing on the overlair skirt may relieve the inseam at the shank of the shoe of much of the strain to which the inseam is subjected, /Vithin the space bounded by the overlaid skirt at the shank and heel seat a shank and heel seat piece is l cated which is required to accurately fit the cavity bounded by the overlaid skirt.

T he object of the present invention is to produce a machine which will trim the marginal portion of the overlaid skirt in an accurate and reliable manner and thus definitelv control the size of the cavity bounded by the overlaid skirt so that a previously prepared shank and heel seat piece may be readily fitted into the cavity with no special care or attention upon the part of an operative. v

To the accomplishment ofthis obiect, and such others as mav hereinafter appear. the features of the invention relate to certain devices, combinations and arrangements of parts hereinafter described and then set Specification of Letters Patent.

Patented Mar. 2, 1920.

Serial No. 231,218.

forth broadly and in detail in the appended claims which possess advantages readily apparent to those skilled in the art.

The various features of the present invention will be readily understood from an inspection of the accompanying drawings illustrating the best form of the invention at present devised, in which,

Figure 1 is a front elevation of the vamp trimming machine showing the position of the parts at the completion of the vamp trimming operation;

Fig. 2 is a detail in front elevation showing the position of the operating tools with relation to the work;

F 3 is a detail in right side elevation of the operating tools;

Fig. 42 is a sectional detail in right side elevation on the line 4l4l, Fig. 2;

Fig. 5 illustrates details in front and left side elevations of the trimming knife;

Fig. 6 is a plan of a shoe illustrating its condition before being operated upon by the machine embodying the features of the present invention;

Fig. 7 is a plan of the shoe'after being operated upon by the machine embodying the features of the present invention and after the inner ply of the upper or the lining h s been skived at the forward ends thereof;

Fig. 8 is a plan of the shank and heel seat piece, and

Fig. 9 is a sectional elevation of a finished Blake welt shoe for trench use while on the last.

in making the Blake" welt shoefor' usein the trenc es by our soldiers overseas the upper 1, having a leatherlining' 52 secured thereto. is updrawn upon a last 3 and secured in updrawn position by cement to the e ge face of an insole 4 secured upon the bot om of t e last in accordance with the method oflast nq disclosed i Letters Patent o the Un ted fiitates, No. 1,261.741, April 2, 1918. At the heel'eud o'f'the shoethe upper 1 with its leather lining 2 is wiped bver u n the heel seat and secured thereto bv tacks The lasted'shoe is then operated" upon by the machine discl sed in my copending applimtion er al No 785,142. filed August 16, 1913. This machine secures a" welt 6 to the lasted shoe by a single thread 7 anchored on tongues 8 formed on the flesh face of the insole and also in the'base of a slit 9 formed in the welt 6. Thereafter the leather lining 2 is overlaid and cemented to the flesh face of the insole from a point adjacent the juncture of the shank and foreis illustrated in Fi 6. The shoe is now repared for the operation of the machine embodying the features of the present invention.

. In the illustrated embodiment of the invention the welted shoe having its bottom in the condition illustrated in Fig. 6 is jacked upon a work support 10 (Fig. 1) of the saddle and spindle type. The work support 10 is provided with runners 11 which slide'on a platen or table 12 secured upon the upper end of a post 13 which is mounted for vertical movement in bearings 1 1 formed in a bracket 15 bolted on the machine column 16.

In order to feed the work support 10 over the table 12 and thus transfer the point of operation of the operating means around the shoe the work support is mounted on a leader 17 provided with a guiding flange. The leader is actuated to transfer the point of operation of the operating means around the shoe by a pinion 18 which engages rack teeth 19 formed on the exterior face of the guiding flange. The pinion 18 is secured to the upper end of a short shaft 20 which carries at its lower end a bevel gear 21 engaged with a similar gear 22. The bevel gear 22 is connected through a universal joint 23 to a horizontal shaft 24 journaled in the machine column 16. The shaft 24: carries a worm wheel 25 which meshes with a worm on a shaft 26 journaled in the column 16. The shaft 26 is driven from a shaft 27 journaled in bearings 28 on the base of the column 16 by a belt 29 which passes over pulleys on the shafts 26 and 27, respectively. The shaft 27 is driven and controlled like the shaft 132 in the insole rounding machine disclosed by me in application Serial No. 113,722, filed August 8, 1916.

During the operation of the machine the leader 17 is fed longitudinally by the pinion 18 and is swung laterally or rotated to transfer the point of operation of the operating means around the curvatures of the shoe by guide rolls, one of which is shown at 30 (F 1).

The tool for trimming the marginal portionof the overlaid skirt of the upper consists of a knife 31 (Figs. 1, 2 and 5) which cuts through the lining 2 at the shank and through the upper and lining at the heel seat against the flesh face of the insole. The knife 31 is secured to a block 32 which is adj ustably mounted in one end of a lever 33 pivoted on stud 34: carried by a stationary cradle supported from the column 16.

The cradle 35 also carries a rigid abutment 36 provided with a steel ball 360 arranged to bear upon the flesh face of the insole and a presser roll 37 arranged to engage the overlaid lining, or upper and lining, and press it against the flesh face of the insole to insure a clean cut by the knife 31. lhe roll 37 is rotatably mounted on pin 38 (Fig. 3) carried by the lower end of a bent arm 39 yieldingly mounted on the cradle 35. To this end the arm 39 is provided with a pair of slots lO which embrace the shank of set screws i1 secured to the cradle 35, the construction permitting the arm to slide a limited distance vertically on the cradle 35. The roll 38 is pressed upon the overlaid skirt by a spring a2, coiled around a threaded IO on the arm 39, and interposed between a washer a l, backed by a nut 15 on the rod, and a bracket 16, rising from the cradle 35, tirough which the rod 43 loosely extends.

The abutment 36 limits the depth of cut of the cutter 31 and to this end carries a threaded rod 4-. connected through adjusting and locking nuts 18 and 19 to a bracket 30 secured to the end of the cradle 35. 'With this construction the presser foot may be adjusted to compensate for the adjustments of the knife 31 and thus limit the depth of cut to the flesh face of the insole. The abutment 36 also controls the height of the work. To this end a coiled spring 51 (Fig. 1) is connected at one end to the column 16 and at its other end to a treadle 52 pivoted on the machine base. Intermediate its ends the treadle 52 is connected to the post 13 by a link 53. Depression of the treadle 52 lowers the work table 12 to permit the insertion and removal of the work. When the treadle is released and the flesh face of the insole engaged with the abutment 36 the shoe automatically race and falls under the influence cf the abutment 36 and spring 51 to maintain the ii le at the operating point in the same plane notwithstanding the various slopes on the last bottom. The post 13 is guided in its vertical movement by a pluality of rolls 5%, on the post, which work in slots 55 formed in the bearings 14..

In order to vibrate the knife 31 the lever 33 is provided with a cylindrical pin 56 igs. 2 and 4) upon which a block 57, provided with trunnions 58 is loosely held by a cotter pin 59. The trunnions 58 support a split yoke 60 (Fig. 1) which is hung on trunnions 61 formed on an eccentric strap 62 The machine illustrated in the drawings starts its cut at the point A (Fig. 6) and continues along the shank and around the heel seat to the point of termination at B. The trimmed overlaid lining 2 is then skived at the forward. ends thereof as shown at 70 and 71 (Fig. 7 in order to make a smooth joint along the line where the insole, lining, shank piece and mid-sole meet. The shank and heel seat piece 72 illustrated in Fig. 8 comprises a piece of died-out leather stock shaped to accurately fit the space within the overlaid skirt 2. As the line of out of the knife 31 is automatically controlled by the leader it is possible to produce the shank and heel seat piece 72 by a dinking operation to accurately fit the space Within the line of cut.

The shank and heel seat piece 72 is secured to the heel seat of the insole by a single tack so that asthe shoe flexes in use the piece 72 may slide along the insole at the shank without buckling and without any tendency to exert a prying pressureupon the sole above it. A mid-sole 78 and an outsole 74: are then assembled with the shoe and se cured to the welt 6 by a line of lock stitches 75.

What is claimed as new, is:

1. A machine for operating upon shoes in process having insoles therein, having in combination, means for pressing the over laid skirt of the upper against the flesh face of the insole, and means for cutting through said skirt against the face of the insole.

2. A machine for operating upon shoes in process having insoles therein, having, in combination, a presser foot for pressing the overlaid skirt of the upper down upon the flesh face of the insole, and a knife for cutting through said skirt against the flesh face of the insole.

3. A machine for operating upon shoes in process having insoles therein, having, in combination, a spring-pressed roll for pressing the overlaid skirt of the upper down upon the flesh face of the insole, and a re-.

ciproeating knife for cutting through said skirt against the flesh face of the insole.

4. A machine for operating upon shoes in process having insoles therein, having, in combination, a shoe support, operating means for trimming the edge of the overlaid skirt of the upper, and means for relatively actuating the support and operating means to transfer the point of operation of the operating means around the shoe.

5. A machine for operating upon a shoe having the vamp thereof overlaid upon the insole from a point adjacent the juncture of the forepart and shank on one side of the shoe around the rearpart' of the shoe to a point adjacent the shank and forepart on the other side of the shoe only, having, in combination, a work support, operating means for trimming the marginal portion of the overlaid vamp, and automatic means for relatively actuating the support and operating means to transfer the point of operation of the operating means between said points.

6. A vamp trimming machine, having, in combination, a longitudinally movable and rotatable work support, a knife to trim the marginal portion of the overlaid skirt of the upper, and means for operating the support to transfer the point of operation of the knife around the shoe.

7. A vamp trimming machine, having, in combination, a rigid abutment arranged to engage the flesh face of the insole, a work support yieldingly impelled toward the abutment, a presser foot arranged to engage the overlaid skirt of the upper, and a trimming knife for trimming the marginal por tion of the overlaid skirt arranged between the presser foot and the abutment.

8. A vamp trimming machine, having, in combination, a rigid abutment arranged to engage the flesh face of the insole, a table yieldingly impelled toward the abutment, a work support interposed between the abutment and the table and freely movable on the table, a presser foot arranged to engage the overlaid skirt of the upper, and a trimming knife for trimming the marginal portion of the overlaid skirt arranged between. the presser foot and the abutment.

In testimony whereof I have signed my name to this specification.

CHARLES C. BLAKE. 

